排序方式: 共有58条查询结果,搜索用时 15 毫秒
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V. I. Minkin I. E. Mikhailov G. A. Dushenko O. E. Kompan A. Zschunke 《Russian Chemical Bulletin》1998,47(5):884-894
The kinetics and mechanism of circumambulatory rearrangements of N-centered (NCS) and S-centered (SPh, SC3Ph3, SC(OEt)=S) groups in corresponding derivatives of 1,2,3-triphenylcyclopropene and cycloheptatriene were studied by dynamic1H and13C NMR spectroscopy. Migrations of the isothiocyanate group occur by the dissociation-recombination mechanism with intermediate formation of a tight ionic pair. Migrations of the phenylthio group around the perimeter of cyclopropene and cycloheptatriene rings occur by the 1,2-shift mechanism. It was found that rearrangements of theO-ethyl dithiocarbonate group inS-(1,2,3-triphenylcyclopropen-3-yl)-O-ethyl dithiocarbonate occur by the 3,3-sigmatropic shift mechanism. The molecular and crystal structure ofO-ethylS-(1,2,3-triphenylcyclopropen-3-yl) dithiocarbonate was studied by X-ray analysis. 相似文献
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Quantum chemical study of intramolecular rearrangements in 3-allyl-3-methyl-1,2-diphenylcyclopropene
Dushenko G. A. Mikhailov I. E. Mikhailova O. I. Minyaev R. M. Minkin V. I. 《Russian Chemical Bulletin》2021,70(4):699-705
Russian Chemical Bulletin - 3-Allyl-3-methyl-1,2-diphenylcyclopropene (1) and 3-allyl-2-methyl-1,3-diphenylcyclopropene (2) were shown by the DFT B3LYP/6-311++G(d,p) method to interconvert with the... 相似文献
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Mikhailov I. E. Artyushkina Yu. M. Dushenko G. A. Minkin V. I. 《Russian Journal of General Chemistry》2020,90(11):2059-2063
Russian Journal of General Chemistry - 2-Aryl-5-butyl-1,3,4-oxadiazoles have been obtained in 59–85% yield via refluxing of equimolar amounts of a benzoic acid hydrazide with trimethyl... 相似文献
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Doklady Physics - The mechanical properties of NWA 12370 chondrite, petrological type H5, depending on the external hydrostatic pressure were studied using ultrasonic waves. This meteorite is a... 相似文献
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Mikhailov I. E. Vikrishchuk N. I. Popov L. D. Beldovskaya A. D. Dushenko G. A. Revinskii Yu. V. Kurbatov S. V. 《Russian Journal of General Chemistry》2017,87(3):575-578
The interaction of 2,3-dimethyl-4-oxo-1,3-benzoxazinium and 2-[β-(4-bromophenylvinyl)]-3-methyl-4-oxo-1,3-benzoxazinium perchlorates with hydrazine hydrate has afforded the corresponding triazoles that have been used as ligands for the synthesis of zinc complexes L2Zn. Luminescent properties of the prepared complexes have been studied.
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I. A. Profatilova A. A. Bumber I. E. Mikhailov G. A. Dushenko M. P. Bubnov V. K. Cherkasov 《Russian Journal of Electrochemistry》2008,44(7):812-817
Redox reactions of a series of substituted cycloheptatrienes are studied on a platinum electrode in acetonitrile using the cyclic voltammetry method. It was found that heptaphenyl-substituted cycloheptatrienes are irreversibly oxidized in two stages in the range of high anodic potentials to form unstable radical cations and dications. As opposed to the unsubstituted and monosubstituted cycloheptatrienes, they are not reduced at the potentials higher than ?2 V (SCE). A new stable radical anion was found in the reduction of N-cycloheptatrienylphthalimide. Its spin density distribution is studied by ESR spectroscopy. 相似文献
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G. A. Dushenko I. E. Mikhailov Yu. M. Artyushkina O. I. Mikhailova V. V. Tkachev S. M. Aldoshin V. I. Minkin 《Russian Journal of General Chemistry》2016,86(6):1306-1313
Density functional theory [DFT B3LYP/6-311++G(d,p)] simulation has revealed stable tautomers and conformers of polydentate ligand system based on 5,7-di(tert-butyl)-2-(8-hydroxyquinolin-2-yl)-1,3-tropolone with different structures of the coordination nodes, capable of formation of metal chelates. It has been shown that the tautomeric NH- and OH- forms with exo and endo location of the hydroxy group in the quinoline fragments (close in energy, ΔEZPE = 0.2–2.4 kcal/mol) are stabilized by intramolecular hydrogen bonds. Energy barriers of the interconversion of these forms via rotation about the C–OH bond of the phenolic fragment are of ΔEZPE≠ = 2.1–4.2 kcal/mol, whereas the barrier of rotation about the bond between the quinoline and tropolone fragments is higher (ΔEZPE≠ = 18.2 and 19.6 kcal/mol). 相似文献